Starting a practice means making many business decisions. One of those is whether you’ll accept insurance or operate a cash-only practice.
A cash-only practice does not literally accept only cash. Patients pay upfront with cash, credit/debit card or check. If they have insurance, they generally file the claim for reimbursement themselves instead of you handling it. (The exception is Medicare. Whether you are in- or out-of-network, you must file a Medicare claim for all active care/treatment or if the patient requests that one be filed.)